Tourists stand on a narrow platform near the top of Brunelleschi's Dome, seen from the adjecent Giotto's Bell Tower (campanile) in Florence. The Basilica di Santa Maria del Fiore is the cathedral church (Duomo) begun in 1296 in the Gothic style to the design of Arnolfo di Cambio and completed structurally in 1436 with the dome engineered by Filippo Brunelleschi. The exterior of the basilica is faced with polychrome marble panels in various shades of green and pink bordered by white and has an elaborate 19th century Gothic Revival facade by Emilio De Fabris. The cathedral complex, located in Piazza del Duomo, includes the Baptistery and Giotto's Campanile. The three buildings are part of the UNESCO World Heritage Site